There are 51 students in Class Three, _____ failed in the test.
| A．all of which | B．all of them | C．none of whom | D．none of them |
---They live on a busy road． --- There ______ be a lot of noise from the traffic．
| A．must | B．may | C．would | D．could |
．_____ the chapter four times, I finally understood the author's theory．
| A．Reading | B．Having read | C．To read | D．Read |
Ann ______ here any more．She left last month．
| A．won't work | B．doesn't work | C．hasn't worked | D．isn't working |
The conference aims to develop business and let people think about _____ they can have a
positive influence on the planet．
| A．why | B．that | C．what | D．how |
—Can I ask you a few straightforward questions about yourself？
—No problem．I like ______ when people are open and direct．
| A．that | B．this | C．it | D．them |